Pump construction



April 1 1935. R. G. BARZEN 1,998,266

PUMP 0 ON STRUC T I 0N Filed June 5., 193i 5 SheetsSheet' 1 A TTORNEY R. G. BARZEN PUMP CONSTRUCTION April 16, 1935.

Filed June 5, 1931 3 Sheets-Sheet 5 I N V EN TQR: Rwluzrd 63012871 BY/z 2 A TTORNEY Patented Apr. '16, 1935 UNITED- STATES PATENT OFFICE 2 Claims.

\ The present invention has reference to pump primer constructions,-and aims to provide an improved and more practical as well as much more eflicient construction for pump priming operations than apparatus which has heretofore been employed for the purpose.

Accordingly, I have devised a practical and efficient primer device which operates upon the injector principle for effecting the priming function, and is adapted to be constructed either as a separate and independent priming unit, or incorporated as a part of the main pump impeller structure, as preferred.

It is also sought to provide an improved construction in which is designed to be preserved all the important elementslfor operating efiiciency so far as practicable, as regards the priming function, and with no sacrifice of the efliciency of the water pumping operation following the priming action.

With the foregoing general objects in view, the invention will now be described by reference to the accompanying drawings illustrating such forms of construction which I have devised for embodying the proposed improvements, after which those features and combinations deemed to be novel will be set forth and claimed.

In the drawings Figure 1 is a vertical sectional view,-illustrating a pump and primer structure constructed in accordance with the present invention;

Figures 2 and 3 are horizontal and vertical sectional views, representing sections taken on the and 3, but showing a modified form of construc-.

lines 22 and 34, respectively, of Figure 1;

Figure 4 is an elevation of the face plateside of the pump with parts broken away and in vertical section; 3

Figure 5 is an enlarged sectional detail view, illustrating one form of injector orifice or nozzle; Figure 6 is a sectional detail of the main impeller portion of the pumprotor;

Figures 7 and 8 are views similar to Figures 1 tion;

Figure 9 is a vertical sectional view' showing the improved primer construction arranged as a, separate and independent unit;

Figure 10 is a vertical sectional view, illustrating the primer as embodying a modified form of injector structure; I 1

Figure 11 is a face view partly broken away, showing the type of rotor used in the construction shown in Figure 10; a

. Figure 12 is a vertical sectional view showing a modified form of construction, with an open type of impeller and a separate tank and piping for the water flow used in the priming operation; j

Figure 13 is a face view of the rotor or impeller member shown in Figure 12; and

Figure 14 is an elevation, on a reduced scale,

' showing the form of construction illustrated in Figure 12.

,Referring now to the construction illustrated Figures 1-6 inclusive, these views illustrate the pump rotor or impeller member as of the enclosed type of rotor 15 andcomprising a series of curved vanes I6 formingvthe impeller pocketsll having the usual function of pocketing the water and imparting a centrifugal movement thereto as the impeller is rotated.

The impeller or rotor is enclosed within a volute housing l8 and formed with a hollow hub housing l8 and preferably formed integral with the interior of acasing 2 I, to which is connected an induction pipe 22.1eading from the source of water supply and feeding into said pipe 20. To

the opposite side of the casing 2 l is secured, as

by bolts 23, a flanged face plate 24 formed with suitable supporting brackets 25 and with a bearing structure, as indicated at 26, for supporting the adjacent end of the operating shaft 21 having a screw threaded connection 28 withthe center of the impeller or rotor l5. In practice, the housing structure l8 may also be formed integral with the casing 2|, to which it is connected by means of the spaced arms or lugs 30 leaving openings 3| for'circulation of the water past the corresponding face of the housing, an opening 32 being also provided for flow of the water as forced by the pump through the volute passage 33 into the main chamber of the casing 2|, from which the water passes by way of the discharge pipe 34. A baflie 35 is located at one side of the opening 32 opposite thepassage 33, for deflecting the flow laterally through said opening. V

The bypass openings 3| are provided for the purpose of permitting a return flow of the water for priming purposes, and in the construction shown in Figures 1-6 the primer is formed as a part of oneface of the rotor l5 and integral therewith, and comprising a hollow disk structure 40 enclosing a series of vanes or impeller members 4 I each terminating opposite a small nozzle or injector opening 42 in the periphery of the disk; in addition to which a small port 43 may be formed in the adjacent lateral face of said disk or impeller member for communication with the inner end of. said injector passage, as clearly represented in Figure 5. The opening 42 itself may be of the nozzle type as illustrated, or may be simply formed as anordinary bore or'passage of uniform diameter, which will serve to carry out the injector action in substantially the same manner.

The hub of the rotor is also formed with an annular passage 45 in communication with a passage 46 in the face plate 24, the lower end of which is open and in receiving relation to the space within the casing 2|, at the exterior of the housing l8, as illustrated in Figure 1. Drain plugs 41 may also be provided at suitable points, as represented in Figure 1, for draining or cleaning the u to which air is admitted by way of the ports 43.

The water with the air thus entrained therein by the action of the primer impeller, and discharged along with the other water driven by the action of the mainimpeller l5, finds its way through the volute passage 33 and is discharged through the opening 32 into the main chamber of the casing The water is then recirculated through the primer impeller structure so long as is necessary to establish the working vacuum in the induction line required for bringing, the water from the main supply to the pump, after which the casing 2| fills up and remains filled as the water is forced on out through the discharge outlet 34. After the main pumping operation is thus established, the priming function remains idle, and at the same time its operation in no wise interferes with or diminishes the effectiveness of the main pumping operation.

While 1 illustrate a lateral port 43 in communication with the injector nozzle passages, such lateral port is not essential, since the construction is operative without it, though its use may under some conditions increase the operating efliciency of the priming function.

In Figures 7 and 8 I illustrate a modified form of construction in which the zone of the secondary or priming impellers operation is separated from that of the main impeller by means of an inwardly projecting flange 50 formed circumferentially around the interior of the housing member l8 to provide a working fit for the rotary movement of the rotor member, and also extended to form a partition for the discharge end of the volute passage 33, thus maintaining the circulation produced by the primer impeller separated from that resulting from the action of the main impeller, until about the time the flows mingle at the opening 32 into the casing 2| (said working fi permitting air to enter'around the rotor).

In the view shown in Figure 9 I illustrate a type of construction in which the primer deviceis embodied as a separate, distinct and independent unit from the main impeller. In this form, the housing I 3' of the impeller has its own-independent intake and outlet conections, and may be operated as an air orgas pump, or for effecting any other desired fluid pmnping operations for which the primer structure is clearly adapted for use as a pumping unit.

In the construction illustrated in Figures 10 and 11, a modification of the primer unit is shown, in which the housing portion 40' and the impeller elements or vanes 4| enclosed thereby are restricted in size, the elements 4| terminating opposite ports or orifices registering with slightly larger ports 5| formed in peripheral lugs 52 carried by the main impeller, in overhanging relation to said ports 50. By this construction, it is apparent that practically an equivalent of the previous constructionis provided, as regards its opcrating functions, the space between the ports 53 and 5| allowing ingress of air in a manner similar to that provided for by the lateral ports 43 in Figure 5.

The operation of priming is carried out in all respectsvthe same as with the construction first described.

In the remaining'views'of the drawings, the construction is illustrated as employing an open type of impeller, together with a tank separate from the impeller housing and employing a pipe for the recirculation of the priming fluid. The impeller is in the form of a .rotor carried by one end of, the drive shaft 21 and comprising a series of hollow arms 60 for supporting the curved impeller vane elements 6|, as clearly illustrated in Figures 12 and 13. The radial passages 62 through the arms 60 are open at both ends, their inner ends all communicating with the hollow interior hub-portion 63 to which isnconnected the return pipe 64 for the recirculation of the priming fluid by way of pipe connections 65 leading from a tank 66 to which the pump discharges. Each of the arms 60 is also provided with a lateral air intake port 68. By means of this construction, it will be clearly understood that as the rotor is operated by the shaft 21, with the casing or housing 2| of the pump initially partly full of water, the water caught up by the impeller structure will be discharged by aninjector action through the radial passage of the arms 60, thus trappin the air admitted by the ports 68, and the air and water thus mingled will be discharged by way of the main discharge line. into the tank 66. As the water is recirculated by the pipe 65 and returned for the priming operation, the degree of I .vacuum in the induction line 22 is, increased, until the main pumping operation is established,

resulting in a continuous fiow of water, with the 1 cessation of the priming function, as in the previous construction.

It will thus be seen that I have devised a compact and exceedingly simple and practical aswell as efficient pump priming construction for carrying out the aforesaid objects'of, invention.

The injector principle whereby the priming function is performed is that best calculated for the rapid removal of the air from the suction line of the pump, and the improved construction herein illustrated will efliciently operate to prime for greater suction lifts than any of the previous well known types of construction. Being built in such compact form in the designs shown in Figures 1-6, all the extra piping for the primary unit is eliminated, the equipment is greatly improved in appearance, and again, being constructed in so few parts which are quickly as- 7 designed for its maximum efliciency in operation,

iollowing which a primer unit of the character herein described may readily be incorporated with the rest of the equipment without interiering in any way with the selected design thereof. as it is apparent that it is immaterial, as regards the .iundamental operation, whether the primer structure itself is made a direct part of or integral with the main or primary impeller member. Moreover, as has already been indicated the primer structure may be operated altogether independently as either an air or gas pump, forv any fluid medium, with the same emci'ency as characterizes its operationas the priming unit of the, ordinary pump outfit.

While I have herein illustrated and described what I now regard as entirely suitable and practicable forms of construction for embodying the proposed features of improvement, I desire to be understood as reserving the right to make whatfluid through the priming means after the pump construction has been eflectually primed, without departing from the essence of invention.

WhatIclaimis: j w

i. A pump impeller construction comprising a disk provided with a hollow cylindrical portion, a plurality of curved vanes enclosed by said cylindrical portion and the latter having a series or peripheral orifices oppositethe free ends of said vanes, and a series of peripheral lugs formed on said disk member and provided with slightly larger ports or orifices registering with said first orifices. e

2. A pump impeller construction comprising a hollow disk member formed with a primary impeller structure, one face of said disk having a hollow reduced cylindrical portion. a series of curved vanes enclosed by said cylindrical portion and the latter having a series of orifices opposite the free ends of said vanes, and a'series of peripheral lugs formed on said disk and provided with nozzle-shaped ports or orifices registering with said first orifices.

, RICHARD G. BARZEN. 

